Crushing mill



(No Model.)

A. E. ROE.

GRUSHING MILL.

Patented A 10, 1888.

UNITED STATES PATENT Carton.

ALPHEUS E. ROE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO 'IATUM 8t BOWEN, OF SAME PLACE.

CRUSHING-MILL.

SPECIFICATION forming part of Letters Patent No. 380,821, dated April 10, 1888. Application filed September 21, 1887. Serial No. 250,358. (No model.)

To aZZ whom it may concern:

,Be it known that I, ALPHEUS E. Ron, of the city and county of San Francisco, State of California, have invented an Improvement in Crushing-Mills; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to certain improvements in crushing-mills which are especially adapted for crushing the ores of valuable metals.

It consists of two or more heavy weights having a series of stamps fitted into their lower convexfaces, and dies upon which these stamps operate, together with a mechanism whereby the two series of oscillating stamps may be caused to move in opposite directions within the same mortar.

It also consists in an improved method of discharging the pulverized ore, as willbe more fully explained by reference to the accompanying drawings, in which- Figure 1 is a longitudinal vertical section through the mortar, showing the two sets of crushing devices and the driving mechanism and discharge. Fig. 2 is a transverse vertical section of the same.

A and B are two heavy blocks of metal,having the lower faces rounded or curved in the arc of a circle; and a a are projecting rubbing plates or blocks upon their sides to steady them and keep them apart when they are in place and at work in the mortars. In these curved faces are fitted stamps C in such a manner that their lower or crushing faces extend in a similar curved are; and D are dies placed in the bottom of the mortar E, so that ore or material fed into this mortar will be crushed between the opposing surfaces.

In order to increase the crushing capacity of my apparatus and make the work more continuous and complete, I have mounted the crushing devices A and B side by side in a single mortar, which is made of sufficient width to accommodate the two. From the upper ends of the Weighted crushers A and B vertically-slotted extensions F project, the slots G forming guides Within which the crank-pins Hand I project, these crank-pins having ro-' tating loosely-fitted sleeves upon them, which reduce the friction as the pins travel in the slots, by reason of the rotation of the disks to which they are attached.

J is the driving-shaft, through which power is applied to actuate these stamps, and upon the end of the shaft J, adjacent to the inner stamping device, is fixed a disk, K, and the crank-pin H projects from this disk, extending through the slot G, and having its outer end fixed in a disk, L, which lies between the two slotted extensions F, as shown in Fig. 2. From a point in the disk L opposite the pin H the pin I passes through the slot of the second or outer crushing device, A, and its outer end is fixed in a similar disk, M. The center of this disk is securely keyed to a short shaft, N, and this shaft turns ina journal-box, O,which is in line with the box P, in which the end of the shaft Jturns. By thisconstruction it will be seen that the intermediate disk, L, is supported in place by means of the crank-pins H and I upon opposite sides of its center, and through this disk and these pins connection is made with the outer disk, M,which, being journaled upon the short shaft, gives a support for the outer end of the driving 1nechanism.

The ore is fed into the'mortar beneath the stamps by any suitable feeding device, and I have shown the discharge-openings Q in the present case made in the ends of the mortar in line with the crushing-stamps. The alter nate oscillations of the stamps will first throw the ore alternately from one side of the crushing dies and stamps to the other, thus greatly increasing the effectiveness of the mill, and the motion of the stamps also tends to throw the ore toward the ends of the mortar, so that when sufficiently pulverized it passes through the screens in the discharge-openings more readily than it would do if these dischargeopenings were placed upon the sides.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the mortar, the oscillating stamps having the vertically-slotted extensions at the upper ends, as shown, the driving-shaft having the disk or crank fixed upon its end, and an outer disk or crank having a short shaft journaled in line with the drivingcrank-pins connected with said blocks andopshaft, in combination with a similar disk incrating the blocks in opposite directions,

termediate between the slotted extensions of whereby the ore is thrown alternately from I 5 the blocks, and crank-pins extending through one side of the stamps to the other, substan- 5 the slots of the two blocks from opposite sides tially as and for the purpose described.

of the intermediate disk, so that power is In witness whereof I have hereunto set my communicated to drive the two from the single hand.

shaft, substantially as herein described.

2. Acrushing-mill comprising a single mor- ALPHEUS IO tar having discharge-openings in its ends, a WVitnesses:

plural number of oscillating blocks having LINCOLN SONNTAG,

projecting stamps, and a driving-shaft having JOHN R. COGHLAN. 

